Hairbrush



FIG. 1 is a bottom plan of the hairbrush showing our new design;

FIG. 2 is a top plan thereof opposite to the bottom plan shown in FIG. 1;

FIG. 3 is a side elevation of the hairbrush;

FIG. 4 is a side elevation of the hairbrush of the side opposite to the side shown in FIG. 3;

FIG. 5 is an end elevation thereof; and,

FIG. 6 is an end elevation of the end opposite the end of the hairbrush shown in FIG. 5. 

The ornamental design for a hairbrush, as shown and described. 